Skip to content
Return due 30 Nov, Start now →
Journal

Tax, written like you're meant to understand it.

Explainers from our tax practice, engineering posts, and field notes from filing season. Slow web, no clickbait.

Engineering27 Jul 2026 · 7 min read

How the TaxWise AI answers without making up tax law

Most AI assistants guess. Ours can't. Every number comes from our deterministic tax engine and every rule is cited back to the Inland Revenue Act — here's how the two-source design works.

DEDasun EdirisingheFounder, TaxWiseRead article →
Engineering
How the TaxWise AI Works
7 min read · TaxWise Journal
17 articles
Engineering27 Jul 2026 · 7 min read

How the TaxWise AI answers without making up tax law

Most AI assistants guess. Ours can't. Every number comes from our deterministic tax engine and every rule is cited back to the Inland Revenue Act — here's how the two-source design works.

DEDasun Edirisinghe
How-to24 Jul 2026 · 9 min read

How do I claim a tax refund from the IRD in Sri Lanka? (Y/A 2025/2026)

Overpaid APIT, AIT or instalments? It's a statutory right, not a favour. The Rs. 180,000 fast-track, the 60% set-off, the 30-month deadline, and the interest the IRD owes when it's slow.

CPCharitha Perera
Tax law20 Jul 2026 · 6 min read

Can the IRD prosecute you for not filing a tax return? (2026)

The IRD can now criminally prosecute non-filers under Act No. 11 of 2026. A written notice, a strict 30-day window, then a fine up to Rs. 400,000 or six months. Who it targets — and who it doesn't.

CPCharitha Perera
Tax law03 Jul 2026 · 10 min read

How are dividends taxed in Sri Lanka? (Y/A 2025/2026)

A resident company withholds 15% on your dividend and that's the whole story — no top-up, no refund, whatever your other income looks like.

CPCharitha Perera
Tax law02 Jul 2026 · 11 min read

How is bank interest taxed in Sri Lanka? (Y/A 2025/2026)

Your bank now deducts 10% on savings and fixed deposit interest, up from 5%. When it's just an advance, when you can stop it, and how to claim it back.

CPCharitha Perera
How-to30 Jun 2026 · 10 min read

How do I register for a TIN in Sri Lanka? (Y/A 2025/2026)

NIC, email, five steps. How to get your TIN online through RAMIS, when companies must register by, and what to do the moment it arrives.

CPCharitha Perera
How-to29 Jun 2026 · 11 min read

What is APIT (formerly PAYE) and how does it work? (Y/A 2025/2026)

Your employer deducts it every month before you're paid. How APIT works, why secondary jobs are taxed differently, and what happens when you file your return.

CPCharitha Perera
Tax law24 Jun 2026 · 13 min read

What is the personal relief (tax-free threshold) in Sri Lanka? (Y/A 2025/2026)

The first LKR 1,800,000 of your total annual income is tax-free — how the personal relief works, who qualifies, and what changed from last year.

CPCharitha Perera
Tax law23 Jun 2026 · 11 min read

What changed in Sri Lankan income tax for 2025/2026?

Higher relief, the 12% band gone, doubled WHT on savings interest, and no more SET — every change in Y/A 2025/2026, with worked examples.

CPCharitha Perera
How-to14 Jun 2026 · 7 min read

How much tax do I pay on my salary in Sri Lanka? (2025/2026)

What actually comes out of your payslip. The APIT tables, the LKR 150,000 monthly threshold, and the tax on common salary levels.

CPCharitha Perera
How-to14 Jun 2026 · 9 min read

Freelancer and remote worker tax in Sri Lanka (2025/2026)

Upwork, foreign clients, no PAYE safety net. The 15% foreign-service cap, the installment calendar, and the expenses you can claim — in order.

CPCharitha Perera
Tax law14 Jun 2026 · 8 min read

How is foreign income taxed in Sri Lanka? (2025/2026)

Money from abroad, taxed at home. The 15% service cap, the FX conversion rule, and the treaty credit that stops you paying twice.

CPCharitha Perera
How-to08 Jun 2026 · 9 min read

How to file your income tax return in Sri Lanka (2025/2026)

From getting a TIN to receiving an IRD acknowledgement — the complete, in-order walkthrough for filing your own return online.

CPCharitha Perera
How-to08 Jun 2026 · 8 min read

How to calculate your income tax in Sri Lanka (2025/2026)

Total income, minus reliefs, through the 2025/2026 brackets, minus credits. The whole method, with a worked example in rupees.

CPCharitha Perera
How-to21 Apr 2026 · 7 min read

How to file freelance income from foreign clients without overpaying

If you invoice in USD or GBP, the FX rate, the DTA, and the WHT certificate matter more than the amount.

CPCharitha Perera
Policy07 Apr 2026 · 6 min read

Why the rent-income deduction stayed at 25% — and what we'd change

A close read of the 2025 Amendment debate, and a quiet argument for a graduated deduction in 2026.

CPCharitha Perera
Tax law17 Mar 2026 · 9 min read

ETF and Gratuity stepped rates: a worked example for a 22-year career

Concessionary rates apply, but only if you do the math in the right order. Step-by-step in LKR.

CPCharitha Perera

One email a fortnight, no filler.

New IRD circulars, deadline reminders, and the one or two articles we think every Sri Lankan filer should read.

Unsubscribe in one click. We never share your email.